git: 312c0ed19cc5..99aabd70801b - vendor/llvm-project/main - vendor branch updated

[Dimitry Andric]

The branch vendor/llvm-project/main has been updated by dim:

URL: https://cgit.FreeBSD.org/src/log/?id=312c0ed19cc5..99aabd70801b

99aabd70801b Vendor import of llvm-project main 
llvmorg-18-init-15692-g007ed0dccd6a.